Subsequent Events (Details)							3 Months Ended
	Feb. 18, 2025 USD ($) $ / shares	Jan. 13, 2025 USD ($) shares	Mar. 20, 2024 USD ($)	Nov. 21, 2023 USD ($) $ / shares shares	Dec. 02, 2021 USD ($)	Jul. 29, 2021 USD ($)	Sep. 30, 2022 $ / shares	Jun. 30, 2022 $ / shares	Mar. 31, 2022 $ / shares	Jan. 12, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 08, 2023 USD ($)	Dec. 07, 2023 USD ($)	Dec. 01, 2021 USD ($)
Subsequent Event [Line Items]
Common stock, dividends declared per share (in usd per share) | $ / shares							$ 0.31	$ 0.31	$ 0.31
Aggregate commitments											$ 10,271,275,000	$ 8,677,882,000
OBDE SPV Asset Facility I | Line of Credit
Subsequent Event [Line Items]
Maximum principal amount													$ 525,000,000	$ 625,000,000
OBDE SPV Asset Facility I | Line of Credit | Minimum
Subsequent Event [Line Items]
Commitment fee percentage						0.00%
OBDE SPV Asset Facility I | Line of Credit | Maximum
Subsequent Event [Line Items]
Commitment fee percentage						1.00%
OBDE SPV Asset Facility I | Line of Credit | SOFR
Subsequent Event [Line Items]
Basis spread on variable rate						2.70%
OBDE SPV Asset Facility I | Line of Credit | CORRA Plus
Subsequent Event [Line Items]
Basis spread on variable rate						2.70%
OBDE SPV Asset Facility I | Line of Credit | EURIBOR Plus
Subsequent Event [Line Items]
Basis spread on variable rate						2.70%
OBDE SPV Asset Facility I | Line of Credit | SONIA Plus
Subsequent Event [Line Items]
Basis spread on variable rate						2.6693%
OBDE SPV Asset Facility I | Line of Credit | Alternate Base Rate
Subsequent Event [Line Items]
Basis spread on variable rate						2.70%
OBDE SPV Asset Facility I | Line of Credit | Bridge Loan
Subsequent Event [Line Items]
Maximum principal amount						$ 100,000,000
OBDE SPV Asset Facility II | Line of Credit
Subsequent Event [Line Items]
Maximum principal amount					$ 500,000,000										$ 350,000,000
OBDE SPV Asset Facility II | Line of Credit | Minimum
Subsequent Event [Line Items]
Fee on unused portion of credit facility					0.00%
OBDE SPV Asset Facility II | Line of Credit | Minimum | Initial Threshold Percentage
Subsequent Event [Line Items]
Fee on unused portion of credit facility					20.00%
OBDE SPV Asset Facility II | Line of Credit | Maximum
Subsequent Event [Line Items]
Fee on unused portion of credit facility					0.25%
OBDE SPV Asset Facility II | Line of Credit | Maximum | Initial Second Threshold Percentage
Subsequent Event [Line Items]
Fee on unused portion of credit facility					35.00%
OBDE SPV Asset Facility II | Line of Credit | SOFR
Subsequent Event [Line Items]
Basis spread on variable rate					1.95%
Basis spread on variable rate, increase per annum					0.15%
Increase per annum in event of default occurs					2.00%
ORCC III Financing II | Line of Credit | Minimum | Initial Third Threshold Percentage
Subsequent Event [Line Items]
Fee on unused portion of credit facility					50.00%
ORCC III Financing II | Line of Credit | Maximum | Initial Fourth Threshold Percentage
Subsequent Event [Line Items]
Fee on unused portion of credit facility					70.00%
OBDE SPV Asset Facility III | Line of Credit
Subsequent Event [Line Items]
Maximum principal amount			$ 300,000,000
Debt instrument revolving period			3 years
Debt instrument prepayment penalty term			2 years
OBDE SPV Asset Facility III | Line of Credit | Minimum
Subsequent Event [Line Items]
Fee on unused portion of credit facility			0.25%
OBDE SPV Asset Facility III | Line of Credit | Maximum
Subsequent Event [Line Items]
Fee on unused portion of credit facility			1.25%
OBDE SPV Asset Facility III | Line of Credit | CORRA Plus
Subsequent Event [Line Items]
Basis spread on variable rate			0.29547%
OBDE SPV Asset Facility III | Line of Credit | EURIBOR Plus | Minimum
Subsequent Event [Line Items]
Basis spread on variable rate			1.75%
OBDE SPV Asset Facility III | Line of Credit | EURIBOR Plus | Maximum
Subsequent Event [Line Items]
Basis spread on variable rate			2.50%
OBDE SPV Asset Facility III | Line of Credit | SONIA Plus
Subsequent Event [Line Items]
Basis spread on variable rate			0.1193%
CLO XIV | Secured Debt
Subsequent Event [Line Items]
Principal amount				$ 397,300,000
CLO XIV, Class A Notes | Secured Debt
Subsequent Event [Line Items]
Basis spread on variable rate				2.40%
Principal amount				$ 203,000,000
CLO XIV, Class B Notes | Secured Debt
Subsequent Event [Line Items]
Basis spread on variable rate				3.25%
Principal amount				$ 32,000,000
CLO XIV, Class A-L Notes | Secured Debt
Subsequent Event [Line Items]
Basis spread on variable rate				2.40%
Principal amount				$ 25,000,000
CLO XIV Issuer | Preferred equity investments
Subsequent Event [Line Items]
Value of shares issued				$ 137,300,000
Shares issued (in shares) | shares				137,300
Issue price (in usd per share) | $ / shares				$ 1,000
CLO XIV Issuer | Middle Market Loans
Subsequent Event [Line Items]
Principal amount				$ 167,300,000
CLO XIV Issuer | Middle Market Loans | ORCC Financing III, LLC
Subsequent Event [Line Items]
Principal amount				$ 204,000,000
Subsequent Event
Subsequent Event [Line Items]
Interest rate, stated percentage		3.125%
Subsequent Event | At The Market Offerings
Subsequent Event [Line Items]
Net proceeds	$ 750,000,000
Subsequent Event | Revolving Credit Facility
Subsequent Event [Line Items]
Aggregate commitments		$ 3,660,000,000								$ 2,990,000,000
Subsequent Event | OBDE Merger Agreement
Subsequent Event [Line Items]
Common stock conversion ratio		0.9779
Aggregate of shares in company (in shares) | shares		120,630,637
Subsequent Event | OBDE Merger Agreement | April 2027 Notes
Subsequent Event [Line Items]
Aggregate principal amount		$ 325,000,000
Interest rate, stated percentage		3.125%
Debt asset coverage (in percentage)		100.00%
Subsequent Event | OBDE Merger Agreement | Series 2022A Notes Of Tranche A Due On July 21, 2025
Subsequent Event [Line Items]
Aggregate principal amount		$ 142,000,000
Interest rate, stated percentage		7.50%
Subsequent Event | OBDE Merger Agreement | Series 2022A Notes Of Tranche B Due On July 21, 2027
Subsequent Event [Line Items]
Aggregate principal amount		$ 190,000,000
Interest rate, stated percentage		7.58%
Subsequent Event | OBDE Merger Agreement | Series 2022B Notes Due On July 21, 2027
Subsequent Event [Line Items]
Aggregate principal amount		$ 60,000,000
Interest rate, stated percentage		7.58%
Subsequent Event | OBDE Merger Agreement | Series 2023A Notes Due On June 29, 2028
Subsequent Event [Line Items]
Aggregate principal amount		$ 100,000,000
Interest rate, stated percentage		8.10%
Minimum net worth		$ 800,000,000
Asset coverage ratio, minimum		1.50
Subsequent Event | OBDE Merger Agreement | Series 2023A Notes | Senior Notes
Subsequent Event [Line Items]
Below investment grade event, interest rate		1.00%
Secured debt ratio event, interest rate		1.50%
Below investment grade and secured debt ratio events, interest rate		2.00%
Subsequent Event | O 2025 Q1 Dividends
Subsequent Event [Line Items]
Common stock, dividends declared per share (in usd per share) | $ / shares	$ 0.37
Subsequent Event | S 2025 Q1 Dividends
Subsequent Event [Line Items]
Common stock, dividends declared per share (in usd per share) | $ / shares	$ 0.05